Good news ... I have removed the entire interior (seat and IP), and I have placed the plane on the outside of the stove which is at about 56º C / 132.8F controlling it so that it does not soften excessively and I made a mold in 1mm brass the way it should have according to the interior of eduard, and I have let it cool little by little and I have managed to make it fit, now because I am reassembling the interior again, but well it will not be as it was before .... then I upload the photos